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OnyxiaFS

OnyxiaFS 是一个基于 Facebook Inc. 在 2010 发表的论文 开发的一个分布式对象文件系统。

组件

OnyxiaGateway

作为所有请求的入口。

OnyxiaDirectory

  1. 维护逻辑卷到物理卷的映射关系；
  2. 负责对读写数据进行负载均衡；
  3. 维护逻辑卷的空闲空间；
  4. 维护图片对应的逻辑卷；

OnyxiaCache

Cache 服务是一个分布式缓存，可以使用数据的 ID 对内容进行索引。当缓存命中失败时，负责从后端 Store 服务获取数据。

OnyxiaStore

每一个 Store 服务维护多个物理卷。每个物理卷存储了百万级别的数据。具体来说，一个物理卷可以被认为是一个超大的文件(比如100G)，被保存在物理磁盘上的某个位置。可以通过图片所在物理卷及偏移量，大小等信息快速读取数据。

Architecture

architecture

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Contributors

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